body {
    padding: 0;
    margin: 0;
}

.blurDiv {
    width: 877px;
    height: 972px;
    margin: 20px auto 0;
    position: relative;
}

a {
    display: block;
    width: 350px;
    height: 60px;
    border-radius: 5px;
    line-height: 60px;
    text-align: center;
    position: absolute;
    top: 105%;
    font-size: 1.5em;
    color: #000000;
    text-decoration: none;
}

#buttonReset {
    left: 7%;
    background-color: aquamarine;
}

#buttonReset :hover {
    background-color: #e41e1e;
}

#buttonShow {
    right: 7%;
    background-color: rgb(107, 173, 226);
}

#buttonShow :hover {
    background-color: #e41e1e;
}

.blurImg {
    width: 877px;
    height: 972px;
    /* 添加滤镜 */
    filter: blur(25px);
}

#canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 877px;
    height: 972px;
}